CN-122015502-A - Water-cooled furnace cover assembly with uniform cooling

CN122015502ACN 122015502 ACN122015502 ACN 122015502ACN-122015502-A

Abstract

The invention discloses a water-cooling furnace cover assembly with uniform cooling, which comprises a furnace cover body, two cold conveying components, a switching component and a cleaning ball, wherein the furnace cover body comprises a plurality of cooling coils, two ends of each cooling coil are respectively provided with a water inlet end and a water outlet end, the two cold conveying components are respectively provided with a cold inlet unit and a cold outlet unit and respectively comprise a water pump and a main pipe branch pipe, the switching component comprises a driving unit and a switching piece, two switching channels with the inner diameter being the same as that of the cooling coils are arranged on the switching piece, the cooling coils and the two switching channels are enclosed to form a cooling pipeline, and the cleaning ball is arranged in the cooling pipeline in a one-to-one correspondence manner and comprises a ball body and a cleaning piece. This even water-cooling bell of cooling drives the cooling water through two defeated cold subassemblies and flows in cooling coil, and the cleaning ball removes along cooling coil along the rivers, destroys cooling coil inner wall water film and incrustation scale through elastic cleaning piece, guarantees the mobility of the nearby water of pipe wall, avoids thermal resistance too big and local overheated, guarantees the cooling homogeneity.

Inventors

SHEN XIFENG
CHEN YAODONG
ZOU XIAOGANG
XU YANWEN

Assignees

江阴盛龙冶金科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (10)

1. A uniformly cooled water cooled furnace cover assembly, comprising: The furnace cover body is provided with a furnace door opening, a charging opening, a smoke outlet and an electrode opening, the electrode opening is positioned at the top of the furnace cover body, the furnace cover body comprises a plurality of cooling coils which are coaxial and are sequentially and hermetically connected, and two ends of each cooling coil are adjacent to each other and are respectively a water inlet end and a water outlet end; the two cold conveying assemblies are a cold inlet unit and a cold outlet unit respectively and comprise a water pump for connecting a cooling water source, a main pipe which is communicated with one end of the water pump far away from the cooling water source and branch pipes which are communicated with the main pipe and are in one-to-one correspondence with the cooling coils; The switching components are in one-to-one correspondence with the cooling coils and are arranged between the corresponding cooling coils and the two cold conveying components, the switching components comprise a driving unit and a switching piece, two switching channels with the inner diameter identical to that of the cooling coils are arranged on the switching piece, the driving unit drives the switching piece to move so as to change the positions of the two switching channels, a branch pipe of the cold inlet unit is communicated with a water inlet end of the corresponding cooling coils through one switching channel, and a branch pipe of the cold outlet unit is communicated with a water outlet end of the corresponding cooling coils through the other switching channel, so that the cooling coils and the two switching channels are enclosed to form a cooling pipeline; Cleaning balls are arranged in the cooling pipelines in a one-to-one correspondence mode, and comprise spheres with outer diameters smaller than the inner diameters of the cooling coils and rigid and elastic cleaning pieces arranged outside the spheres, wherein the cleaning pieces are bristles densely distributed on the spheres or cleaning layers arranged on the spheres, and the cleaning pieces are in butt joint with the inner walls of the cooling pipelines.
2. The uniformly cooled water cooled furnace cover assembly according to claim 1, wherein the cleaning ball further comprises a sub-runner with a spiral extending track and two ends extending to the outer surface of the sub-runner.
3. The uniformly cooled water-cooled furnace cover assembly of claim 1, wherein a water-passing interceptor is disposed in the end of the switching channel corresponding to the water outlet end, which is far away from the cooling coil, and the water-passing interceptor is used for preventing the cleaning ball from entering the branch pipe of the cooling unit and allowing water to pass through.
4. The uniformly cooled water cooled furnace cover assembly of claim 1, wherein the ends of the two switching channels remote from the cooling coil are each provided with a water blocking member.
5. The water-cooled furnace cover assembly uniformly cooled according to any one of claims 1-3, wherein the switching piece comprises a hollow shell and a switching disc in sealing fit connection with the inner wall of the shell, the switching disc is a disc, switching through holes distributed in an annular array by taking the self axis as a central line are formed in the switching disc, two opposite sides of the shell are respectively provided with two inlet and outlet through holes, and the driving unit drives the switching disc to rotate by taking the self axis as the central line, so that the switching through holes are communicated with the inlet and outlet through holes on the two sides of the shell to form a switching channel in a combined mode, and meanwhile the positions of the switching through holes are adjusted.
6. The uniformly cooled water cooled furnace cover assembly of claim 5, wherein the switching assembly further comprises a detection unit for detecting whether the cleaning ball passes the water outlet end.
7. The uniformly cooled water-cooled furnace cover assembly according to claim 6, wherein an observation port, the coaxial line of which is opposite to the water outlet end and is close to the water outlet end, is arranged on the side wall of the cooling coil, an observation window is arranged in the observation port, the detection unit comprises a light emitter and a light receiver which are both connected with the shell and are opposite to each other, and the light emitter, the two observation windows and the light receiver are sequentially distributed on the same straight line.
8. The uniformly cooled water cooled furnace cover assembly of claim 7, wherein the detection unit further comprises a sealing cylinder, the cooling coil and the housing enclose a sealing cavity, and the emitting end of the light emitter and the receiving end of the light receiver are both positioned in the sealing cavity.
9. The uniform cooling water-cooled furnace cover assembly of claim 5, wherein the shell is further provided with a disassembly opening with an inner diameter larger than the outer diameter of the sphere, the disassembly opening is detachably connected with a sealing plug, the rotation path of the switching through hole comprises a disassembly station, and the switching through hole is directly communicated with the disassembly opening under the disassembly station.
10. The water-cooled furnace cover assembly with uniform cooling according to claim 5, wherein the shell is further provided with a material adding port, the rotating path of the switching through hole comprises a material adding station, the switching through hole is directly communicated with the material adding port under the material adding station, the material adding port is connected with a material adding unit, and the material adding unit is used for adding a scale inhibitor into the switching through hole through the material adding port.

Description

Water-cooled furnace cover assembly with uniform cooling Technical Field The invention relates to the technical field of water-cooled furnace covers, in particular to a water-cooled furnace cover assembly with uniform cooling. Background The water-cooled furnace cover is a key part at the top of a metallurgical furnace, an electric arc furnace and a refining furnace, and mainly aims to cover a furnace mouth and seal high-temperature flue gas, and meanwhile, the water-cooled furnace cover is used for forcedly cooling the furnace cover, so that the furnace cover is not burnt out in a high-temperature environment. The water-cooled furnace cover in the prior art mostly adopts a multi-layer concentric annular cooling coil structure, and the furnace cover is continuously cooled by means of cooling water so as to ensure that the furnace cover stably works under a high-temperature working condition. In the long-term running process of the water-cooled furnace cover, the inner wall of the pipeline is easy to scale, the heat transfer resistance is increased, the heat exchange efficiency and the cooling effect are reduced, local pipeline blockage is caused even the furnace cover is overheated and deformed and damaged in severe cases, a stable water film is easily formed on the pipe wall, heat exchange is affected, steam is easily generated, particularly, when cooling water flows in the pipe, a water film with slow flow speed and relatively static heat conductivity is formed near the pipe wall area, the heat conductivity coefficient of the water film is low, heat transfer is seriously hindered, meanwhile, the water film is subjected to high-temperature radiation of the furnace cover for a long time, the water film is extremely easily subjected to thermal vaporization to form water steam, a steam heat insulation layer is formed near the pipe wall, local overheating is caused, the cooling uniformity and the safe running of the furnace cover are affected, in addition, in order to reduce the generation of scale, chemical scale inhibition agent is usually put into a cooling water circulation system, but the uniformity of agent addition of the inner wall of the pipeline is difficult to ensure, the local agent concentration is too high to corrode the pipeline, the local agent concentration is too low, the effective scale inhibition is insufficient, the agent utilization rate is low, and the long-term running cost is increased. Therefore, there is a need for improvements in the water cooled furnace covers of the prior art. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide a uniform cooling water-cooled furnace cover assembly which can greatly reduce scale, improve cooling uniformity and efficiency and prevent local overheating. In order to achieve the technical effects, the technical scheme of the invention is that the water-cooled furnace cover assembly with uniform cooling comprises: The furnace cover body is provided with a furnace door opening, a charging opening, a smoke outlet and an electrode opening, the electrode opening is positioned at the top of the furnace cover body, the furnace cover body comprises a plurality of cooling coils which are coaxial and are sequentially and hermetically connected, and two ends of each cooling coil are adjacent to each other and are respectively a water inlet end and a water outlet end; the two cold conveying assemblies are a cold inlet unit and a cold outlet unit respectively and comprise a water pump for connecting a cooling water source, a main pipe which is communicated with one end of the water pump far away from the cooling water source and branch pipes which are communicated with the main pipe and are in one-to-one correspondence with the cooling coils; The switching components are in one-to-one correspondence with the cooling coils and are arranged between the corresponding cooling coils and the two cold conveying components, the switching components comprise a driving unit and a switching piece, two switching channels with the inner diameter identical to that of the cooling coils are arranged on the switching piece, the driving unit drives the switching piece to move so as to change the positions of the two switching channels, a branch pipe of the cold inlet unit is communicated with a water inlet end of the corresponding cooling coils through one switching channel, and a branch pipe of the cold outlet unit is communicated with a water outlet end of the corresponding cooling coils through the other switching channel, so that the cooling coils and the two switching channels are enclosed to form a cooling pipeline; Cleaning balls are arranged in the cooling pipelines in a one-to-one correspondence mode, and comprise spheres with outer diameters smaller than the inner diameters of the cooling coils and rigid and elastic cleaning pieces arranged outside the spheres, wherein the cleaning pieces are bristles densely distributed on the s